Colonial Mainspring for Waltham 12s Factory No. 2224A - Alloy

Colonial Mainspring for Waltham 12s Model 1894, Factory No. 2224A, alloy, new envelope. See images for further details. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts and all watch parts are guaranteed. Images do a pretty good job of representing the item.